Attachment eor radio receiving apparatus



Aug. 4, 1925.

W. G. CONGER ATTAGHMENT Fon RADIO RECEIVING APPARATUS Filed Aug. 3, 1923 VENTOR.

ATTORNEY Patented Aug. 4, 1925.

UNITED STATES Partnr ATTACHMENT FOR RADIO RECEIVING APPARATUS.

Application filed August 3, 1923.

To all whom t may concern:

Be it known that I, WALTER G. CONGER,

a citizen of the United States, residing atv Independence, county of Jackson, State of Missouri, have invented certain new and useful Improvements in Attachments for Radio Receiving Apparatus, of which the following is a specification.

This invention relates to apparatus for use in connection with radio receiving sets, having to do particularly with means whereby head telephones may be easily applied to or removed from the receiving set.

An object of the invention is to provide means of a simplified nature whereby any number of head phone outfits may be easily and quickly switched in or out of the circuit of the receiving set.

A further object is to provide an attachment of the character and for the purpose stated by the use of which one or more head phones may be used in connection with the receiving set, and which may be easily applied to or removed from the receiving apparatus.

A still further object is to provide an attachment of the character stated which is characterized by simple construction, which may be manufactured or produced at low cost, which comprises a minimum of simple and readily assembled parts, which parts are so constructed and arranged as to obviate the possibility of wear, breakage or derangement, and which will prove highly practical and efficient in operation.

With these and other objects in view, the invention consists of the features of construction, combinationand arrangement of parts, hereinafter fully described and claimed, reference being had to the accompanying drawing, in which t Figure 1 is a plan view of an attachment constructed in accordance with the invention and illustrating in diagram the wiring circuits thereof,

Figure 2 is a bottom plan view of the attachment,

Figure 3 is a longitudinal sectional view taken upon line 3-3 of Figure 1, and

Figure 4L is a similar view taken upon line 4-4 of Figure 1.

Referring now more particularly to the drawing, 5 indicates a base, bed, block or platform of any suitable size and preferably constructed of insulated material, and to which the apparatus to be hereafter detailed Serial No. 655,481.

is applied. This platform or block is preferably rectangular in form and is of a size to enable it to be conveniently used in connection with familiar types of radio receiving sets, the said block being provided as at 6 with openings through which screws may be inserted, if desired, to secure the block upon a table or other support adjacent to the radio receiving set.

Near one longitudinal edge of the block 5 are arranged spaced connectors 7 in the form of binding post-s, and which I have termed the lead-in7 posts. These posts are adapted to receive the terminals of conductors 8 and 9 leading from the radio receiving set and to which, ordinarily, head telephones are .attached or which connect with other sound reproducing apparatus. rlhe posts 7 are suitably secured to the block 5 and pass entirely through the same, so that wires or conductors may be applied to the under ends thereof, as will be hereafter detailed.

Arranged in series adjacent to the opposite edge of the platform 5 are a plurality of terminals or binding posts; the latter being indicated by the reference characters 10, 11, 12, 13, 1li, 15 and 16, the said posts extending entirely through the platform 5 in the same manner as the posts 7 above-mentioned. @ne of the posts 7 is Connected with an end post 10 of the above-mentioned series by means of a conductor or wire 17, arranged beneath the block 5, while each of the posts 11, 12, 13, 14, 15 and 1G constitutes one terminal of a plurality of conductors indicated at 11', 12, 13', 14', 15 and 16'; these conductors having their opposite ends passed up through suitable openings in the block 5 longitudinally alined with the center thereof and constituting spaced contacts as shown.

The contact ends of the conductors 11 to 16 inclusive are disposed beneath a conductor bar 18, preferably rectangular in cross-section, and which is supported above the upper surface. of the bar 5 by brackets 19 as shown. A screw 20 of one of these brackets passes entirely through the platform 5 and to which one end of a conductor 21 is attached; the opposite end of this conductor being connected with the other of the lead-in posts 7.

Slidably mounted upon the conductor bar 1S is a sliding member 22, having a linger grip 23 rising from the upper side thereof, and which is provided on its underside with a downwardly extending spring contact iinger 24, adapted as the slide member moves along the conductor barto engage successively the several contacts constitutingl the inne-r ends ot the conductors 11 to 16 'inelusive. As the said contact members are spaced apart a substantial distance,-'it is apparent that when the iinger 24 rests upon the base in between any pair of such contacts, no circuit Will be established through the slide member and conductor bar 18.

In operation, the Wires 8 9 of the radio receiving set are vconnected with the contact member of binding posts 7 upon the platform, Aand the terminals 25and 26 of a head telephone apparatus represented generally lat 27 are attached tobinding posts 10 and Y11.

The slide member 22 is then moved so that the 'finger 24; thereof will be 1n engagelmentWith the contact member at the inner end oi: conductor member 11. When so coupled, the circuit is through Wire 8, bind- Vand theother terminal to `binding post 12,

and the movable contact member 22 Will be moved so'that the inger thereof will be engaged with thecontact constituting the inner end of the conductor 12. The circuit will then be in through Wire 8, conductor 17, bindingpost 10, terminal 25 of the'head telephones, 4head phone 27, terminal 26 of the head telephones, post 11, then through the terminals ot the additional set of head y telephones, as Welll as the head phone per se,

and back through conductor member 12', as ivi'll be understood. Any number of additionalhead phones, up to six, may be plugged in tothe circuit, it merely being vnecessary to attachthe terminals theerof to a pair of successive ybinding posts oi the series, and moving the sliding contact member 22 so that the finger thereof Will engage (up to six) .head phones to the circuit of the radio receiving apparatus. While, in lthe present instance, means are Vprovided for coupling as many as sixihead phones tothe circuit, it is4 to be understood that binding posts for 'the accommodation' orV 'attachment 4or more or less numbers of head phones may beused. In the present instance,lfor purposes of illustration and convenience of description only, the several membersy to which the conductors are attached are termed binding posts, however it will be understood that any preferred type of terminal connector may be equally as Well used, and it is also to be understood that the present device is not to be limited to the use with any particular typeroi' binding post or terminal connector.

. f Furthermore, it is apparent that changes in 1Vthe various details of construction, vthe size, proportion and arrangement of parts, y

may be liberally resorted to it' desired With- ,out departingfrom the invention as defined by the claims.

v Having thus tion, I claim: y A

'1. Inan attachment ofthe class described, a base, binding posts onthe base to receive the leaddn Wires from radio receiving apparatus,"a series of posts on said base arranged in spaced relation 'and adapted to receive the terminals ot sound reproducing apparatus, a connection between one of the said lead-in posts and an 'end post of said series, Contact members connected with each of the Vremaining posts of said series, a conductor bar, a contact member slidable upon fully Adescribed my inven- "said bar'and 'adapted'to engage successively withL said ycontacts as it is movedalong the p bar,v and a connection'betiveen said bar and the other of said lead-in'posts. y

2. In an attachment of the class described,

Aa base, ai pair 'oll'ead-in posts on said base,

Avafseries of posts'arrangedin spaced 'relation upon 'saidfbase,aconnection between 'oneof said lead-in lposts andthe end bpost of said series, a plurality of spaced contacts ons'aid base corresponding in number tothe Aremainder of "said posts ofthe series, a conductor connecting each` contact member lWith its-respective lpost, a conductor bar overly-ing the saidcont`a`cts,'a slide member yarranged upon said bar, a contact finger on said slide member adapted successively to engage 'ivith said contacts, and a con- Vnection between said bar andthe other of said lead-inposts. y

3. In an attachment of the class described, Aafbase, .3a. pair of lead-in posts on saidbase, a series otposts on said base spaced from each other and lfrom said lead-inposts, a Econductor connecting one of said series of posts with oneof said lead-in posts, a plurality of spacedscontacts corresponding in number to .the remainder of said series of posts, .ar conductor for each contact connectv ing it with its corresponding post of the series, a conductor bar adjacent said contacts, aV connection between said bar` and the `other of saidlead-ifn posts, and a slide conductor on said bar adapted tobe moved to 'successively engage said contacts.

4.111 an attachment "of the class' described,

CII

a base formed of insulating material, a pair of lead-in posts on said base, a series of posts on said base, a series of contacts on said base spaced from each other and corresponding in number to the series of posts, a conductor connecting each contact with its respective post of the series, and a slide contact member on said base electrically connected with one of said lead-in posts and adapted to engage with said contact members.

5. In an attachment of the class described, a base formed of insulating material, a series of contacts on said base and a series of posts corresponding to the contacts, a conductor connecting each contact with its respective post, means on said posts for connecting the terminals of electric apparatus thereto, a slide member adapted to engage with said contacts, a connection between said slide member and an extraneous source of energy, a post insulated from said contacts, and means whereby said post may be connected to the other pole of said extraneous source of energy.

6. In an attachment of the character described, a base formed of insulating material, a pair of lead-in posts on said base parallel with each other and near one edge of the base, a series of posts arranged in parallel alinement near the opposite edge of the base, a connection between one ot said leadin posts and one end post of said series, a plurality of spaced contacts alined with each other and spaced equidistantly between said lead-in posts and series, said contacts being in number one less than said spaced posts, a conductor connecting each contact member with its respective post, a conductor bar overlying said contacts, a slide niember on said bar, a contact linger on said slide member to successively engage said contacts, and a connection between the lower end of said bar and the other of said lead-in posts.

ln testimony whereof I afliX my signature hereto.

l/VALTER Gr. CONGER. 

